/* * Author: Jon Trulson * Copyright (c) 2015 Intel Corporation. * * Permission is hereby granted, free of charge, to any person obtaining * a copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include #include #include "dfrph.hpp" using namespace upm; DFRPH::DFRPH(int pin, float vref) : _dev(dfrph_init(pin)) { if (_dev == NULL) throw std::invalid_argument(std::string(__FUNCTION__) + ": dfrph_init() failed, invalid pin?"); } DFRPH::~DFRPH() { dfrph_close(_dev); } void DFRPH::setOffset(float offset) { dfrph_set_offset(_dev, offset); } void DFRPH::setScale(float scale) { dfrph_set_scale(_dev, scale); } float DFRPH::volts() { float volts = 0.0; dfrph_get_raw_volts(_dev, &volts); return volts; } float DFRPH::pH(unsigned int samples) { float ph_avg = 0.0; // Read at least 1 sample if (samples == 0) samples = 1; float ph = 0.0; for (unsigned int i = 0; i < samples; i++) { dfrph_get_ph(_dev, &ph); ph_avg += ph; } return ph_avg/samples; }